[dmd-beta] dmd 2.064 beta take 2

[Kenji Hara]

2013/5/17 Don Clugston <dclugston at gmail.com>
>
> > What do you find unacceptable/inconvenient in "-transition=XXX" approach?
>
> Because 100% of existing cases must be changed.
>
> This isn't even like static variables becoming shared by default, where
> some of the cases needed to change to __gshared but the rest were OK with
> becoming shared.
> Every existing usage becomes a bug. There are no exceptions.
>

In 2.063, some non-mutable field access were already changed to error.

struct S {
    immutable int x = 10;
}
enum y = S.x;  // 2.063 will cause "need 'this' for x" error.

At least in such cases, these are not silent breaking of existing code.

Kenji Hara
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